Relay
electrically operated switch
(Redirected from Relays)
A relay is an electromagnetically operated switch. It was invented in the 19th century to make electric telegraph signals go farther. Nowadays relays control circuits with low-voltages. Many machines use them, including vehicles and electronics.
![](http://up.wiki.x.io/wikipedia/commons/thumb/8/8a/Electronic_component_relays.jpg/220px-Electronic_component_relays.jpg)
![](http://up.wiki.x.io/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
Wikimedia Commons has media related to Relays.